614 lines
15 KiB
C
614 lines
15 KiB
C
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// Copyright (c) 1999-2004
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// Utrecht University (The Netherlands),
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// ETH Zurich (Switzerland),
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// INRIA Sophia-Antipolis (France),
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// Max-Planck-Institute Saarbruecken (Germany),
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// and Tel-Aviv University (Israel). All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 3 of the License,
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// or (at your option) any later version.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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// SPDX-License-Identifier: LGPL-3.0+
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//
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//
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// Author(s) : Andreas Fabri, Herve Bronnimann, Sylvain Pion
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#ifdef CGAL_USE_GEOMVIEW
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#ifdef CGAL_HEADER_ONLY
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#define CGAL_INLINE_FUNCTION inline
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#else
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#define CGAL_INLINE_FUNCTION
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#endif
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#include <sstream>
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#include <csignal>
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#include <cerrno>
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#include <cstring>
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#include <cstdlib>
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#include <unistd.h>
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#include <sys/types.h> // kill() on SunPro requires these 2 #includes.
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#include <signal.h>
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#include <CGAL/IO/binary_file_io.h>
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namespace CGAL {
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CGAL_INLINE_FUNCTION
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Geomview_stream::Geomview_stream(const Bbox_3 &bbox,
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const char *machine,
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const char *login)
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: bb(bbox), vertex_color(BLACK), edge_color(BLACK), face_color(BLACK),
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wired_flag(false), echo_flag(true), raw_flag(false),
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trace_flag(false), binary_flag(false),
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line_width(1)
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{
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setup_geomview(machine, login);
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frame(bbox);
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pickplane(bbox);
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set_vertex_radius((bbox.xmax() - bbox.xmin())/100.0);
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}
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CGAL_INLINE_FUNCTION
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Geomview_stream::~Geomview_stream()
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{
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kill(pid, SIGKILL); // kills geomview
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}
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CGAL_INLINE_FUNCTION
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void Geomview_stream::setup_geomview(const char *machine, const char *login)
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{
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int pipe_out[2], pipe_in[2];
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// Communication between CGAL and geomview should be possible
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// in two directions. To achieve this we open two pipes
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std::cout << "Starting Geomview..." << std::flush;
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if (pipe(pipe_out) < 0) {
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CGAL_error_msg( "out pipe failed" );
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}
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if (pipe(pipe_in) < 0) {
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CGAL_error_msg( "in pipe failed" );
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}
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switch (pid = fork()){
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case -1:
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CGAL_error_msg( "fork failed" );
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case 0: // The child process
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close(pipe_out[1]); // does not write to the out pipe,
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close(pipe_in[0]); // does not read from the in pipe.
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if (dup2(pipe_out[0], 0) != 0)
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std::cerr << "Connect pipe to stdin failed." << std::endl;
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if (dup2(pipe_in[1], 1) != 1)
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std::cerr << "Connect pipe to stdout failed." << std::endl;
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if (machine && (std::strlen(machine)>0)) {
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std::string s (" rgeomview ");
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s += machine;
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s += ":0.0";
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execlp("rsh", "rsh", machine, "-l", login, s.data(),
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static_cast<void *>(NULL)); // cast to stop gcc warning
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} else {
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execlp("geomview", "geomview", "-c", "-",
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static_cast<void *>(NULL)); // cast to stop gcc warning
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}
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// if we get to this point something went wrong.
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std::cerr << "execl geomview failed" << std::endl;
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switch(errno) {
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case EACCES:
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std::cerr << "please check your environment variable PATH"
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<< std::endl;
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std::cerr << "make sure the file `geomview' is contained in it"
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<< std::endl;
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std::cerr << "and is executable" << std::endl;
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break;
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case ELOOP:
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std::cerr << "too many links for filename `geomview'" << std::endl;
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break;
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default:
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std::cerr << "error number " << errno << " (check `man execlp')"
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<< std::endl;
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};
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CGAL_error();
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default: // The parent process
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close(pipe_out[0]); // does not read from the out pipe,
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close(pipe_in[1]); // does not write to the in pipe.
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in = pipe_in[0];
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out = pipe_out[1];
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// Necessary to wait a little bit for Geomview,
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// otherwise you won't be able to ask for points...
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sleep(1);
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#if 1
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// We want to get rid of the requirement in the CGAL doc about
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// (echo "started"). But we want to be backward compatible, that is,
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// people who have this echo in their .geomview must still have CGAL
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// working, at least for a few public releases.
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// So the plan is to send, from CGAL, the command : (echo "CGAL-3D")
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// It's the same length as "started", 7.
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// Then we read 7 chars from Geomview, and test which string it is.
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// If it's "CGAL-3D", then fine, the user doesn't have .geomview with
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// the back-compatible echo command.
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// In the very long run, we'll be able to get rid of all this code as
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// well.
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// Maybe we should simply read the pipe, till we find "CGAL-3D" ?
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*this << "(echo \"CGAL-3D\")";
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char inbuf[10];
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std::size_t retread=::read(in, inbuf, 7);
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(void)retread;
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if (std::strncmp(inbuf, "started", 7) == 0)
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{
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// std::cerr << "You still have a .geomview file with the\n"
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// << "(echo \"started\") command. Note that this is not\n"
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// << "compulsory anymore, since CGAL 2.3" << std::endl;
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// Then the next one is supposed to be CGAL-3D.
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retread=::read(in, inbuf, 7);
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(void)retread;
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if (std::strncmp(inbuf, "CGAL-3D", 7) != 0)
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std::cerr << "Unexpected string from Geomview !" << std::endl;
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}
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else if (std::strncmp(inbuf, "CGAL-3D", 7) == 0)
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{
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// std::cerr << "Good, you don't have a .geomview file with the\n"
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// << "(echo \"started\") command" << std::endl;
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}
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else
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{
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std::cerr << "Unexcepted string from Geomview at initialization!\n"
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<< "Going on nevertheless !" << std::endl;
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}
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#else
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// Old original version
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char inbuf[10];
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// Waits for "started" from the .geomview file.
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retread=::read(in, inbuf, 7);
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(void)retread;
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#endif
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std::cout << "done." << std::endl;
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(*this) << "(normalization g* none)(bbox-draw g* no)";
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}
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}
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CGAL_INLINE_FUNCTION
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void
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Geomview_stream::pickplane(const Bbox_3 &bbox)
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{
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bool bin_bak = set_binary_mode();
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(*this) << "(geometry pickplane {QUAD BINARY\n"
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<< 1
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// here are the four corners
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<< bbox.xmin() << bbox.ymin() << bbox.zmin()
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<< bbox.xmin() << bbox.ymax() << bbox.zmin()
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<< bbox.xmax() << bbox.ymax() << bbox.zmin()
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<< bbox.xmax() << bbox.ymin() << bbox.zmin()
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// close the text bracket
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<< "}) (pickable pickplane no)";
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set_ascii_mode(bin_bak);
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}
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CGAL_INLINE_FUNCTION
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void
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Geomview_stream::clear()
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{
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(*this) << "(delete World)";
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id.clear();
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}
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CGAL_INLINE_FUNCTION
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void
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Geomview_stream::look_recenter()
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{
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(*this) << "(look-recenter World)";
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}
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CGAL_INLINE_FUNCTION
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Geomview_stream&
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Geomview_stream::operator<<(const std::string & s)
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{
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if ((int)s.length() != ::write(out, s.data(), s.length())) {
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CGAL_error_msg( "write problem in the pipe while sending data to geomview" );
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}
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trace(s);
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return *this;
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}
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CGAL_INLINE_FUNCTION
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Geomview_stream&
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Geomview_stream::operator<<(int i)
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{
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// Depending on the mode chosen
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if (get_binary_mode()) {
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// we write raw binary data to the stream.
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int num = i;
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I_swap_to_big_endian(num);
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std::size_t retwrite=::write(out, (char*)&num, sizeof(num));
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(void)retwrite;
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trace(i);
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} else {
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// transform the int in a character sequence and put whitespace around
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std::ostringstream str;
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str << i << ' ' << std::ends;
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*this << str.str().c_str();
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}
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return *this;
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}
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CGAL_INLINE_FUNCTION
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Geomview_stream&
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Geomview_stream::operator<<(unsigned int i)
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{
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// Depending on the mode chosen
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if (get_binary_mode()) {
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// we write raw binary data to the stream.
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unsigned int num = i;
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I_swap_to_big_endian(num);
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std::size_t retwrite=::write(out, (char*)&num, sizeof(num));
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(void)retwrite;
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trace(i);
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} else {
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// transform the int in a character sequence and put whitespace around
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std::ostringstream str;
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str << i << ' ' << std::ends;
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*this << str.str().c_str();
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}
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return *this;
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}
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CGAL_INLINE_FUNCTION
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Geomview_stream&
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Geomview_stream::operator<<(long i)
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{
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return operator<<((int) i);
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}
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CGAL_INLINE_FUNCTION
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Geomview_stream&
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Geomview_stream::operator<<(unsigned long i)
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{
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return operator<<((unsigned int) i);
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}
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CGAL_INLINE_FUNCTION
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Geomview_stream&
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Geomview_stream::operator<<(double d)
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{
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float f = float(d);
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if (get_binary_mode()) {
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float num = float(d);
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I_swap_to_big_endian(num);
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std::size_t retwrite= ::write(out, (char*)&num, sizeof(num));
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(void)retwrite;
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trace(f);
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} else {
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// 'copy' the float in a string and append a blank
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std::ostringstream str;
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str << f << ' ' << std::ends;
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*this << str.str().c_str();
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}
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return *this;
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}
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CGAL_INLINE_FUNCTION
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Geomview_stream&
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operator<<(Geomview_stream &gv, const Bbox_2 &bbox)
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{
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bool ascii_bak = gv.set_ascii_mode();
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gv << "(geometry " << gv.get_new_id("Bbox")
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<< " {VECT 1 5 0 5 0 ";
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// here are the four corners
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gv << bbox.xmin() << bbox.ymin() << 0.0
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<< bbox.xmin() << bbox.ymax() << 0.0
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<< bbox.xmax() << bbox.ymax() << 0.0
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<< bbox.xmax() << bbox.ymin() << 0.0
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<< bbox.xmin() << bbox.ymin() << 0.0;
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// close the text bracket
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gv << "})";
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gv.set_ascii_mode(ascii_bak);
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return gv;
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}
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CGAL_INLINE_FUNCTION
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Geomview_stream&
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operator<<(Geomview_stream &gv, const Bbox_3 &bbox)
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{
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bool ascii_bak = gv.set_ascii_mode();
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gv << "(geometry " << gv.get_new_id("Bbox")
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<< " {appearance {material {edgecolor "
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<< gv.ecr() << gv.ecg() << gv.ecb() << "}}{SKEL 8 4 "
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// here are the corners
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<< bbox.xmin() << bbox.ymin() << bbox.zmin()
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<< bbox.xmin() << bbox.ymax() << bbox.zmin()
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<< bbox.xmax() << bbox.ymax() << bbox.zmin()
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<< bbox.xmax() << bbox.ymin() << bbox.zmin()
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<< bbox.xmax() << bbox.ymin() << bbox.zmax()
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<< bbox.xmax() << bbox.ymax() << bbox.zmax()
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<< bbox.xmin() << bbox.ymax() << bbox.zmax()
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<< bbox.xmin() << bbox.ymin() << bbox.zmax()
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<< "10 0 1 2 3 4 5 6 7 0 3\n"
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<< "2 1 6\n"
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<< "2 2 5\n"
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<< "2 4 7\n"
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// close the text bracket
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<< "}})";
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gv.set_ascii_mode(ascii_bak);
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return gv;
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||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
void
|
||
|
|
Geomview_stream::set_bg_color(const Color &c)
|
||
|
|
{
|
||
|
|
bool ascii_bak = set_ascii_mode();
|
||
|
|
*this << "(backcolor \"Camera\" "
|
||
|
|
<< double(c.r())/255.0
|
||
|
|
<< double(c.g())/255.0
|
||
|
|
<< double(c.b())/255.0
|
||
|
|
<< ")";
|
||
|
|
set_ascii_mode(ascii_bak);
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
Geomview_stream&
|
||
|
|
Geomview_stream::operator<<(const Color &c)
|
||
|
|
{
|
||
|
|
vertex_color = edge_color = face_color = c;
|
||
|
|
return (*this);
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
Color
|
||
|
|
Geomview_stream::get_vertex_color() const
|
||
|
|
{
|
||
|
|
return vertex_color;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
Color
|
||
|
|
Geomview_stream::get_edge_color() const
|
||
|
|
{
|
||
|
|
return edge_color;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
Color
|
||
|
|
Geomview_stream::get_face_color() const
|
||
|
|
{
|
||
|
|
return face_color;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
Color
|
||
|
|
Geomview_stream::set_vertex_color(const Color &c)
|
||
|
|
{
|
||
|
|
Color old = vertex_color;
|
||
|
|
vertex_color = c;
|
||
|
|
return old;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
Color
|
||
|
|
Geomview_stream::set_edge_color(const Color &c)
|
||
|
|
{
|
||
|
|
Color old = edge_color;
|
||
|
|
edge_color = c;
|
||
|
|
return old;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
Color
|
||
|
|
Geomview_stream::set_face_color(const Color &c)
|
||
|
|
{
|
||
|
|
Color old = face_color;
|
||
|
|
face_color = c;
|
||
|
|
return old;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
double
|
||
|
|
Geomview_stream::vcr() const
|
||
|
|
{
|
||
|
|
return double(vertex_color.r())/255.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
double
|
||
|
|
Geomview_stream::vcg() const
|
||
|
|
{
|
||
|
|
return double(vertex_color.g())/255.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
double
|
||
|
|
Geomview_stream::vcb() const
|
||
|
|
{
|
||
|
|
return double(vertex_color.b())/255.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
double
|
||
|
|
Geomview_stream::ecr() const
|
||
|
|
{
|
||
|
|
return double(edge_color.r())/255.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
double
|
||
|
|
Geomview_stream::ecg() const
|
||
|
|
{
|
||
|
|
return double(edge_color.g())/255.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
double
|
||
|
|
Geomview_stream::ecb() const
|
||
|
|
{
|
||
|
|
return double(edge_color.b())/255.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
double
|
||
|
|
Geomview_stream::fcr() const
|
||
|
|
{
|
||
|
|
return double(face_color.r())/255.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
double
|
||
|
|
Geomview_stream::fcg() const
|
||
|
|
{
|
||
|
|
return double(face_color.g())/255.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
double
|
||
|
|
Geomview_stream::fcb() const
|
||
|
|
{
|
||
|
|
return double(face_color.b())/255.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
void
|
||
|
|
Geomview_stream::frame(const Bbox_3 &bbox)
|
||
|
|
{
|
||
|
|
(*this) << bbox << "(look-recenter g0 c0)";
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
Geomview_stream&
|
||
|
|
Geomview_stream::operator>>(char *expr)
|
||
|
|
{
|
||
|
|
// Skip whitespaces
|
||
|
|
do {
|
||
|
|
std::size_t retread=::read(in, expr, 1);
|
||
|
|
(void)retread;
|
||
|
|
} while (expr[0] != '(');
|
||
|
|
|
||
|
|
int pcount = 1;
|
||
|
|
int i = 1;
|
||
|
|
while (1) {
|
||
|
|
std::size_t retread=::read(in, &expr[i], 1);
|
||
|
|
(void)retread;
|
||
|
|
if (expr[i] == ')'){
|
||
|
|
pcount--;
|
||
|
|
} else if (expr[i] == '('){
|
||
|
|
pcount++;
|
||
|
|
}
|
||
|
|
if (pcount == 0){
|
||
|
|
expr[i+1]='\0';
|
||
|
|
break; // we encountered a balanced number of parantheses
|
||
|
|
}
|
||
|
|
i++;
|
||
|
|
}
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parse a Lisp expression, return a pointer to the beginning of the
|
||
|
|
// nth subexpression, and terminate it by '\0'.
|
||
|
|
// It's either a word terminated by ' ' or ')', or a well parenthesed
|
||
|
|
// expression, or a quoted "string".
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
char*
|
||
|
|
Geomview_stream::nth(char* s, int count)
|
||
|
|
{
|
||
|
|
s++; // skip first character (always a parenthesis)
|
||
|
|
|
||
|
|
// Skip "count" words.
|
||
|
|
for(; count != 0; count--) {
|
||
|
|
while (*s == ' ') // skip whitespaces
|
||
|
|
s++;
|
||
|
|
s++;
|
||
|
|
while (*s != ' ') // skip a word
|
||
|
|
s++;
|
||
|
|
}
|
||
|
|
while (*s == ' ') // skip whitespaces
|
||
|
|
s++;
|
||
|
|
|
||
|
|
// Now we have the beginning of the searched sub-expression.
|
||
|
|
int j = 1;
|
||
|
|
if (*s == '(') // Case of a well-parenthesed expression.
|
||
|
|
for (int pcount = 1; pcount != 0;) {
|
||
|
|
if (s[j] == ')') pcount--;
|
||
|
|
if (s[j] == '(') pcount++;
|
||
|
|
j++;
|
||
|
|
}
|
||
|
|
else if (*s == '"') { // Case of a quoted "string".
|
||
|
|
while (s[j] != '"')
|
||
|
|
j++;
|
||
|
|
j++;
|
||
|
|
}
|
||
|
|
else // Case of a word terminated by ' ' or ')'.
|
||
|
|
while (s[j] != ' ' && s[j] != ')')
|
||
|
|
j++;
|
||
|
|
|
||
|
|
s[j] = '\0';
|
||
|
|
return s;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
void
|
||
|
|
Geomview_stream::parse_point(const char* pickpoint,
|
||
|
|
double &x, double &y, double &z, double &w)
|
||
|
|
{
|
||
|
|
std::stringstream ss;
|
||
|
|
ss << pickpoint << std::ends;
|
||
|
|
|
||
|
|
char parenthesis;
|
||
|
|
ss >> parenthesis >> x >> y >> z >> w;
|
||
|
|
}
|
||
|
|
|
||
|
|
CGAL_INLINE_FUNCTION
|
||
|
|
std::string
|
||
|
|
Geomview_stream::get_new_id(const std::string & s)
|
||
|
|
{
|
||
|
|
std::ostringstream str;
|
||
|
|
str << s << id[s]++ << std::ends;
|
||
|
|
return str.str();
|
||
|
|
}
|
||
|
|
|
||
|
|
} //namespace CGAL
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#ifndef CGAL_HEADER_ONLY
|
||
|
|
// Add a dummy symbol to prevent warnings of empty translation unit.
|
||
|
|
namespace CGAL {
|
||
|
|
namespace {
|
||
|
|
int dummy;
|
||
|
|
}
|
||
|
|
} //namespace CGAL
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif // CGAL_USE_GEOMVIEW
|